Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: d8725da8ac
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 446 lines (393 sloc) 10.309 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445
/* lp.c */
/* Copyright 1995 by Steve Kirkendall */


/* This file contains generic printing code. */

#include "elvis.h"
#ifdef FEATURE_RCSID
char id_lp[] = "$Id: lp.c,v 2.39 2003/10/17 17:41:23 steve Exp $";
#endif
#ifdef FEATURE_LPR

#if USE_PROTOTYPES
static LPTYPE *findtype(char *name);
# if defined (GUI_WIN32)
static void dummyprt(_CHAR_ ch);
# endif
static void prtchar(_CHAR_ ch);
static void draw(CHAR *p, long qty, _char_ font, long offset);
#endif


/* This is a list of all known printer types. The first one is the default. */
static LPTYPE *alltypes[] = { &lpdumb, &lpepson, &lppana, &lpibm, &lphp,
&lpcr, &lpbs, &lpansi, &lphtml, &lpps, &lpps2,
#if defined (GUI_WIN32)
&lpwindows,
#endif
};
static LPTYPE *type; /* type of printer being used at the moment */

/* Page formatting variables */
static int pagenum; /* page number withing this printing */
static int linesleft; /* number of usable lines left on this page */
static int column; /* column number, used to implement wrapping */
static WINDOW prwin; /* window doing the printing */
static ELVBOOL anytext; /* ElvFalse if blank page, ElvTrue if any text */
static long lnum; /* line number of current line */

/* Output buffering variables */
static CHAR *iobuf; /* pointer to the I/O buffer */
static int iomax; /* number of CHARS that the iobuf can hold */
static int ionext; /* number of CHARS currently in iobuf */

/* Return the value of a field from lpoptions, as a string */
char *lpoptfield(field, dflt)
char *field; /* name of the field to retrieve */
char *dflt; /* default value, if not in lpoptions */
{
int len;
static char buf[50];
char *scan;

/* if no options, then return "" */
if (!o_lpoptions || !*o_lpoptions)
return dflt;

/* look for the requested field */
len = strlen(field);
for (scan = tochar8(o_lpoptions); scan && *scan;)
{
/* is this it? */
if (!strncmp(scan, field, len) && scan[len] == ':')
{
/* found! copy the value into buf */
for (len = 0;
len < QTY(buf)-1 && scan[len] && scan[len] != '\0';
len++)
{
buf[len] = scan[len];
}
buf[len] = '\0';

/* if default is Boolean then force Boolean values */
if (!strcmp(dflt, "false") || !strcmp(dflt, "true"))
{
if (strchr("nNfF0", buf[0]))
strcpy(buf, "false");
else
strcpy(buf, "true");
}

/* return it */
return buf;
}

/* scan for the next field */
scan = strchr(scan, ',');
if (scan)
{
scan++;
while (elvspace(*scan))
scan++;
}
}

/*not found -- return the default */
return dflt;
}


/* This function converts a type name to an LPTYPE pointer. Returns NULL if
* unsuccessful. If the name is NULL, it returns the default LPTYPE.
*/
static LPTYPE *findtype(name)
char *name; /* name of printer type */
{
int i;

/* if name is NULL, return the default type */
if (name == NULL)
{
return alltypes[0];
}

/* search for the name in the list */
for (i = 0; i < QTY(alltypes); i++)
{
if (!strcmp(name, alltypes[i]->name))
{
return alltypes[i];
}
}

/* failed */
return NULL;
}

/* return the RGB value for the foreground of a given font. This takes into
* consideration the "lpcolor" and "lpcontrast" options.
*/
unsigned char *lpfg(fontcode)
_char_ fontcode;
{
static unsigned char rgb[3];
int i, j;

if (o_lpcolor)
{
/* fetch the RGB value from colorinfo[] */
memcpy(rgb, colorinfo[fontcode].lpfg_rgb, 3);

/* if the color is too pale, then darken it */
i = rgb[0] + rgb[1] + rgb[2];
j = 3 * (255 - (o_lpcontrast * 255 / 100));
if (i > j)
{
rgb[0] = (unsigned char)(rgb[0] * j / i);
rgb[1] = (unsigned char)(rgb[1] * j / i);
rgb[2] = (unsigned char)(rgb[2] * j / i);
}
}
else
{
/* nolpcolor, always use black */
memset(rgb, 0, 3);
}

return rgb;
}

#if defined (GUI_WIN32)
static void dummyprt(ch)
_CHAR_ ch; /* character to be sent to printer */
{
}
#endif
/* This function copies a single character to the printer (or file).
* Internally, is uses a large I/O buffer for the sake of efficiency.
*/
static void prtchar(ch)
_CHAR_ ch; /* character to be sent to printer */
{
assert(ionext >= 0 && ionext < iomax);
iobuf[ionext++] = ch;
if (ionext == iomax)
{
iowrite(iobuf, ionext);
ionext = 0;
}
}

/* This function takes a single character from the mode's image() function
* and passes it to the LP driver. This function also performs newline
* conversion, line wrapping/clipping, and page breaks.
*/
static void draw(p, qty, font, offset)
CHAR *p; /* character to be output */
long qty; /* number of characters to be output */
_char_ font; /* font of character */
long offset; /* buffer offset of ch, or -1 if not from buffer */
{
WINDOW win;
long delta;
CHAR ch;
char lnumstr[20];

/* A negative qty indicates that the character *p is to be repeated.
*/
if (qty < 0)
{
delta = 0;
qty = -qty;
}
else
{
delta = 1;
}

for ( ; qty > 0; qty--, p += delta)
{
ch = *p;

/* VTAB is treated either as a '\f', or as two '\n's */
if (ch == '\013' || (o_lplines == 0 && ch == '\f'))
{
if (o_lplines == 0 || linesleft >= 5)
{
ch = '\n';
draw(&ch, 1L, font, offset);
}
else
{
ch = '\f';
}
}

/* maybe output a line number */
if (column == 0 /* at start of line */
&& o_lpnumber /* "lpnumber" option is set */
&& offset >= -1 /* not doing header or line number */
&& ch != '\f') /* character isn't formfeed */
{
/* output a line number */
sprintf(lnumstr, "%6ld ", lnum);
draw(toCHAR(lnumstr), 8, 'n', -2L);
}

/* if line is too long, then wrap it or clip it */
if (o_lpcolumns > 0 && column >= o_lpcolumns && ch != '\f' && ch != '\n')
{
/* if we're supposed to clip, then just ignore this char */
if (!o_lpwrap)
{
continue;
}

/* else insert a newline */
if (o_lpcrlf)
{
(*type->fontch)(font, '\r');
}
(*type->fontch)(font, '\n');

/* that newline has the side-effects of incrementing the line
* number and resetting the column number.
*/
linesleft--;
column = 0;
}

/* FF is treated specially, below */
if (ch != '\f')
{
/* maybe convert newline to CR-LF */
if (ch == '\n' && o_lpcrlf)
{
(*type->fontch)(font, '\r');
}

/* pass the character to the LP driver */
(*type->fontch)(font, ch);

/* if the character was newline, then decrement the
* number of lines left on this page, and reset the
* column to 0.
*/
if (ch == '\n')
{
linesleft--;
column = 0;
}
else /* must have been a normal printable character */
{
column++;
anytext = ElvTrue;
}
}

if ((ch == '\f' && anytext) || (o_lplines > 0 && linesleft <= 1))
{
/* End the line, if it has any characters in it */
if (column > 0)
{
(*type->fontch)('n', '\n');
column = 0;
linesleft--;
}

/* End this page */
(*type->page)(linesleft);
linesleft = o_lplines;

/* Start the next page by calling the mode's header() function.
* This can cause this draw() function to be called recursively.
* If the header is larger than the page size, we could
* potentially get stuck in a loop. To avoid this, we will
* temporarily set prwin to NULL.
*/
pagenum++;
if (prwin && prwin->md->header)
{
win = prwin;
prwin = NULL;
(*win->md->header)(win, pagenum, win->mi, draw);
prwin = win;
}
anytext = ElvFalse;
}
}
}

/* This function performs printing. */
RESULT lp(win, top, bottom, force)
WINDOW win; /* window where print request was generated */
MARK top; /* start of text to be printed */
MARK bottom; /* end of text to be printed */
ELVBOOL force; /* allow an existing file to be clobbered? */
{
long oldcurs;
MARK next;
CHAR *origdisplay = NULL;
char *out;
char rwa;

/* convert the value of o_lptype to an LPTYPE pointer */
type = findtype(tochar8(o_lptype));
if (!type)
{
msg(MSG_ERROR, "bad lptype");
return RESULT_ERROR;
}

/* Switch to the bufdisplay display mode, if not that way already */
if (CHARcmp(o_display(win), o_bufdisplay(markbuffer(top))))
{
origdisplay = CHARdup(o_display(win));
if (!dispset(win, tochar8(o_bufdisplay(markbuffer(top)))))
{
safefree(origdisplay);
return RESULT_ERROR;
}
}

/* Call the mode's setup function. Pretend the cursor is at the
* top of the print region, so setup() doesn't try to scroll.
*/
next = (*win->md->setup)(win, top, markoffset(top), bottom, win->mi);

/* open file or filter program */
if (type->spooled)
{
rwa = 'w';
out = tochar8(o_lpout);
if (!out || !*out)
{
msg(MSG_ERROR, "must set lpout");
goto Error;
}
if (out[0] == '>' && out[1] == '>')
out += 2, rwa = 'a';
if (!ioopen(out, rwa, ElvTrue, force, 'b'))
{
goto Error;
}
}

/* allocate the I/O buffer */
iomax = 1024;
iobuf = (CHAR *)safealloc(iomax, sizeof(CHAR));
ionext = 0;

/* initialize the LP driver */
#if defined (GUI_WIN32)
if (strcmp (o_lptype, "windows") == 0)
(*type->before)(type->minorno, dummyprt);
else
#endif
(*type->before)(type->minorno, prtchar);

/* start the first page */
pagenum = 1;
linesleft = o_lplines;
column = 0;
prwin = win;
if (win->md->header)
{
(*win->md->header)(win, pagenum, win->mi, draw);
}
anytext = ElvFalse;

/* generate image lines, and send them to the printer. Temporarily
* move the cursor to the end of the buffer so it doesn't affect
* the appearance of the text.
*/
oldcurs = markoffset(win->cursor);
marksetoffset(win->cursor, o_bufchars(markbuffer(win->cursor)));
while (markoffset(next) < markoffset(bottom))
{
lnum = markline(next);
next = (*win->md->image)(win, next, win->mi, draw);
}
marksetoffset(win->cursor, oldcurs);

/* end the printout */
(*type->after)(linesleft);

/* end the I/O */
if (ionext > 0)
{
iowrite(iobuf, ionext);
}
safefree(iobuf);
if (type->spooled && !ioclose())
goto Error;

/* clean up and return success */
if (origdisplay)
{
(void)dispset(win, tochar8(origdisplay));
safefree(origdisplay);
}
msg(MSG_STATUS, "[d]$1 pages", (long)pagenum);
return RESULT_COMPLETE;

Error:
/* clean up and return failure */
if (origdisplay)
{
(void)dispset(win, tochar8(origdisplay));
safefree(origdisplay);
}
return RESULT_ERROR;
}
#endif /* FEATURE_LPR */
Something went wrong with that request. Please try again.